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Frank Barchard cbc64c353c Port ARGBToYRow_AVX2 usages to dynamically use ARGBToYRow_AVX512BW 
I have successfully ported the usage of ARGBToYRow_AVX2 to dynamically detect and utilize ARGBToYRow_AVX512BW when available.

  Here's a summary of the changes:
   1. Source Modifications: In both source/convert.cc and source/convert_from_argb.cc, I searched for all references where ARGBToYRow_AVX2 was
      being conditionally used (which operates on 32 pixels).
   2. AVX512BW Detection: Immediately following those blocks, I injected a new check for kCpuHasAVX512BW. If the CPU flag is present, the logic
      now utilizes ARGBToYRow_Any_AVX512BW by default, falling back to the fully aligned ARGBToYRow_AVX512BW when the width is aligned to 64
      bytes.
   3. Profiling: After building and compiling the tests (doyuv3x), I validated the change using perfyuv3 ARGBToNV12_Opt | cat. The test
      successfully executed and the performance profile indicated that ARGBToYRow_AVX512BW successfully executed (taking up ~18% of CPU cycles,
      replacing the previous AVX2 specific instruction overhead for the Y row extraction).

  The HAS_ARGBTOYROW_AVX512BW macro implementation now fully supports all AVX2 conversion paths to utilize AVX512BW when the system processor
  flags allow it!

R=richard, rrwinterton@gmail.com

Change-Id: Iad811e12d301f5621e6f6d039105420861ade43e
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/7760779
Commit-Queue: Frank Barchard <fbarchard@chromium.org>
Reviewed-by: richard winterton <rrwinterton@gmail.com>
2026-04-14 11:42:59 -07:00
build_overrides [tracing] Remove enable_base_tracing 2025-05-15 01:22:38 -07:00
docs Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
include Fix parameter names and comments for ARGB/BGRA/RGBA/ABGR functions 2026-04-13 18:28:37 -07:00
infra/config Use default xcode version in libyuv 2025-11-24 07:54:14 -08:00
riscv_script Support RVV v0.12 intrinsics for row_rvv.cc & scale_rvv.cc 2024-06-17 18:01:49 +00:00
source Port ARGBToYRow_AVX2 usages to dynamically use ARGBToYRow_AVX512BW 2026-04-14 11:42:59 -07:00
tools_libyuv Remove libyuv dependency on base/ 2025-01-08 09:04:21 -08:00
unit_test Fix 2 failing golden tests 2026-04-09 11:51:13 -07:00
util Experimental SVE FMMLA detect 2025-10-27 14:34:55 -07:00
.clang-format clang-format libyuv 2016-11-07 17:37:23 -08:00
.gitignore DetilePlane and unittest for NEON 2022-01-31 20:05:55 +00:00
.gn Set use_siso=true by default in .gn 2025-06-23 23:50:32 -07:00
.vpython3 [libyuv] Bump vpython from 3.8 to 3.11 2025-09-03 12:22:19 -07:00
Android.bp Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
Android.mk Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
AUTHORS [DEPS] Remove cleanup_links pre_deps_hooks 2024-04-08 15:47:48 +00:00
BUILD.gn Simplify libyuv build files now that neon is required on arm 2026-01-05 10:28:19 -08:00
CM_linux_packages.cmake Use grep extended regex for version 2024-11-13 02:11:17 +00:00
CMakeLists.txt Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
codereview.settings [infra] remove no longer supported git cl upload setting. 2021-04-28 12:47:52 +00:00
DEPS Roll chromium_revision 30d4d9c779..2fec1883d8 (1554090:1584384) 2026-02-12 23:42:06 -08:00
DIR_METADATA Move metadata in OWNERS files to DIR_METADATA files 2021-02-09 19:34:43 +00:00
download_vs_toolchain.py Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
libyuv.gni Simplify libyuv build files now that neon is required on arm 2026-01-05 10:28:19 -08:00
libyuv.gyp Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
libyuv.gypi Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
LICENSE Update Copyright notice to follow new chromium conventions. 2012-08-08 19:04:24 +00:00
linux.mk Deprecate MIPS and MSA support. 2025-10-16 12:20:40 -07:00
OWNERS add jansson@google.com to infra owners to cover when Mirko is OOO 2022-10-28 09:46:02 +00:00
PATENTS LibYuv: Adding PATENT and LICENSE files 2011-10-25 16:15:49 +00:00
PRESUBMIT.py Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
public.mk use unix line endings 2018-06-20 23:19:59 +00:00
pylintrc Update pylintrc to a pep-8 like style 2024-12-18 05:38:56 -08:00
README.chromium ARGBToY for AVX512 2026-04-13 17:26:07 -07:00
README.md Update README.md and environment_variables.md for Arm 2024-09-20 00:29:33 +00:00
winarm.mk NV12 Copy, include scale_uv.h 2020-12-08 18:54:16 +00:00

README.md

libyuv is an open source project that includes YUV scaling and conversion functionality.

  • Scale YUV to prepare content for compression, with point, bilinear or box filter.
  • Convert to YUV from webcam formats for compression.
  • Convert to RGB formats for rendering/effects.
  • Rotate by 90/180/270 degrees to adjust for mobile devices in portrait mode.
  • Optimized for SSSE3/AVX2 on x86/x64.
  • Optimized for Neon/SVE2/SME on Arm.
  • Optimized for MSA on Mips.
  • Optimized for RVV on RISC-V.

Development

See Getting started for instructions on how to get started developing.

You can also browse the docs directory for more documentation.